hymer BMC 550, Instruction Manual

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Wheels and tyres 13
B-MC - 12/18-2 - EHG-0016-01EN
219
Weight refers to the maximum permissible axle load which can be distrib-
uted on two tyres. The maximum load-carrying capacity of a tyre is indicated
by its load index (= LI, load index code).
The maximum permissible speed for a tyre (with full load-carrying capacity)
is indicated by the speed index (= SI). Together, load index and speed index
form the operating code of a tyre. This is an official component of the com-
plete, standardised dimensions description which appears on every tyre.
The information on the tyres must correspond to the specifications which
appear in the vehicle papers.
13.3 Tyre specifications
Description Explanation
215/70 R 15C 109/107
Q (example)
215 Tyre width in mm
70 Height-to-width proportion in percent
R Tyre design (R = radial)
15 Rim diameter in inches
C Commercial (transporter)
109 Load index code for single tyres
107 Load index code for twin tyres
Q Speed index (Q = 160 km/h)
13.4 Handling of tyres

Drive over kerbs at an obtuse angle. Otherwise the flanks of the tyres
may get pinched. Driving over a kerb at a sharp angle can damage the
tyre and result in it getting ruptured.

Drive over high manhole covers at a slow speed. Otherwise the tyres
may get pinched. Driving over a high manhole cover at high speed can
damage the tyre and result in it getting ruptured.

Check the shock absorbers regularly. Driving with poor shock absorbers
significantly increases wear.

In the event of an uneven thread wear, contact customer service.

Do not clean the tyres with a high-pressure cleaner. The tyres can suffer
serious damage within just a few seconds and rupture as a result.
13.5 Changing wheels
13.5.1 General instructions

The vehicle must be on level, firm ground, secure from slipping.

Go into first gear. In the case of automatic transmission, change gear
to "P" position.

Before jacking up the vehicle firmly apply the handbrake.

Prevent the vehicle from rolling away by blocking the opposite wheel
with the wheel chocks.
 Under no circumstances jack the vehicle with the fitted supports.